optirun执行错误的解决办法

个人系统是kubuntu15.04,在安装双显卡切换软件bumblebee时遇到了一些问题. 执行optirun时会发生一些错误, 例如: [ERROR]The Bumblebee daemon has not been started yet or the socket path /var/run/bumblebee.socket was incorrect. [ERROR]Could not

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